.nav{
    position: fixed;
    z-index: 9999;
    bottom: 0;
    left: 0;
    width: 100vw;
    background: #fff;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    font-size: 12px;
}
.nav-item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 10px;
}
.nav-item .iconfont{
    font-size: 18px;
}
.nav-item_active{
    color: #FF6146;
}